White Clawed Crayfish

White Clawed Crayfish populations are concentrated in northern and central England and their distribution is governed by geology, water quality and the presence of the non-native Signal Crayfish. They can be found in canals, streams, rivers, lakes, reservoirs, mill ponds and water filled quarries. Their preference is for mineral rich waters over calcareous and rapidly weathering rocks. Good flowing water habitats are those with cobbles and rock riffles, roots and woody vegetation, undermined and overhanging banks, heterogeneous flow patterns and water saturated logs.

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